Descripción del desarrollo organizacional y curricular de diferentes tipos de centro y etapas educativas

[Es] Esta aportación sintetiza el estudio que están desarrollando profesores del Área de Didáctica y Organización escolar de la UPV y de la UAB (2005-06). Su contenido aborda las relaciones entre los estadios de desarrollo organizativo y curricular y los resultados escolares. Los primeros datos sugieren que hay una mayor cohesión y coherencia en los centros pequeños, de titularidad pública y de un solo modelo lingüístico. Curiosamente, esta aparente identidad común se apoya más en la estructura participativa y en los sistemas de aprendizaje organizacional y no tanto en la cultura institucional y la cultura colaborativa. Estas últimas dependen más del tamaño del centro y del modelo lingüístico que de la titularidad. Llama la atención que el liderazgo transformacional se vincula más a la titularidad pública y a los centros de secundaria, no relacionándose significativamente con el tamaño del centro, el modelo lingüístico o los años vinculados al ejercicio de cargos.

Stimulation discomfort comparison of asynchronous and synchronous methods with multi-field electrodes

Functional Electrical Stimulation (FES) is a technique that consists on applying electrical current pulses to artificially activate motor nerve fibers and produce muscle contractions to achieve functional movements. The main applications of FES are within the rehabilitation field, in which this technique is used to aid recovery or to restore lost motor functions. People that benefit of FES are usually patients with neurological disorders which result in motor dysfunctions; most common patients include stroke and spinal cord injury (SCI). Neuroprosthesis are devices that have their basis in FES technique, and their aim is to bridge interrupted or damaged neural paths between the brain and upper or lower limbs. One of the aims of neuroprosthesis is to artificially generate muscle contractions that produce functional movements, and therefore, assist impaired people by making them able to perform activities of daily living (ADL). FES applies current pulses and stimulates nerve fibers by means of electrodes, which can be either implanted or surface electrodes. Both of them have advantages and disadvantages. Implanted electrodes need open surgery to place them next to the nerve root, so these electrodes carry many disadvantages that are produced by the use of invasive techniques. In return, as the electrodes are attached to the nerve, they make it easier to achieve selective functional movements. On the contrary, surface electrodes are not invasive and are easily attached or detached on the skin. Main disadvantages of surface electrodes are the difficulty of selectively stimulating nerve fibers and uncomfortable feeling perceived by users due to sensory nerves located in the skin. Electrical stimulation surface electrode technology has improved significantly through the years and recently, multi-field electrodes have been suggested. This multi-field or matrix electrode approach brings many advantages to FES; among them it is the possibility of easily applying different stimulation methods and techniques. The main goal of this thesis is therefore, to test two stimulation methods, which are asynchronous and synchronous stimulation, in the upper limb with multi-field electrodes. To this end, a purpose-built wrist torque measuring system and a graphic user interface were developed to measure wrist torque produced with each of the methods and to efficiently carry out the experiments. Then, both methods were tested on 15 healthy subjects and sensitivity results were analyzed for different cases. Results show that there are significant differences between methods regarding sensation in some cases, which can affect effectiveness or success of FES.

Open Personalization: Involving Third Parties in Improving the User Experience of Websites

Traditional software development captures the user needs during the requirement analysis. The Web makes this endeavour even harder due to the difficulty to determine who these users are. In an attempt to tackle the heterogeneity of the user base, Web Personalization techniques are proposed to guide the users’ experience. In addition, Open Innovation allows organisations to look beyond their internal resources to develop new products or improve existing processes. This thesis sits in between by introducing Open Personalization as a means to incorporate actors other than webmasters in the personalization of web applications. The aim is to provide the technological basis that builds up a trusty environment for webmasters and companion actors to collaborate, i.e. "an architecture of participation". Such architecture very much depends on these actors’ profile. This work tackles three profiles (i.e. software partners, hobby programmers and end users), and proposes three "architectures of participation" tuned for each profile. Each architecture rests on different technologies: a .NET annotation library based on Inversion of Control for software partners, a Modding Interface in JavaScript for hobby programmers, and finally, a domain specific language for end-users. Proof-of-concept implementations are available for the three cases while a quantitative evaluation is conducted for the domain specific language.

Adaptive Scalable SVD Unit for Fast Processing of Large LSE Problems

Singular Value Decomposition (SVD) is a key linear algebraic operation in many scientific and engineering applications. In particular, many computational intelligence systems rely on machine learning methods involving high dimensionality datasets that have to be fast processed for real-time adaptability. In this paper we describe a practical FPGA (Field Programmable Gate Array) implementation of a SVD processor for accelerating the solution of large LSE problems. The design approach has been comprehensive, from the algorithmic refinement to the numerical analysis to the customization for an efficient hardware realization. The processing scheme rests on an adaptive vector rotation evaluator for error regularization that enhances convergence speed with no penalty on the solution accuracy. The proposed architecture, which follows a data transfer scheme, is scalable and based on the interconnection of simple rotations units, which allows for a trade-off between occupied area and processing acceleration in the final implementation. This permits the SVD processor to be implemented both on low-cost and highend FPGAs, according to the final application requirements.

Ikas-Komunitateak: solasaldi dialogiko literarioak eta irakur-laguna, Etxebarriko Kukullaga eskolan.

[EUS] Egungo informazioaren gizartean, etengabeko aldaketa sakonak jasaten eta sortzen ditugu, halaber gure gizabanako harremanetan ere. Hala ere, hezkuntzak oraindik ez du aldaketa handirik egin, izan ere, nahiko estatikoa izaten jarraitzen du eta bertan ematen diren harremanak zeharo hierarkikoak dira. Honengatik guztiagatik, ikerketa honen xede nagusia, Ikas-Komunitateak eta honen barruan dagoen Etxebarriko KUKULLAGA LHI (Bizkaia) aztertzea izango da. Horrez gain, eskolarekin batera diseinatu dudan proiektua aurkeztuko dut, zeinean Ikas-Komunitateen bi jarduera burutzen diren: irakur-laguna eta solasaldi dialogiko literarioak. Bertan, Lehen Hezkuntzako 6. mailako eta 5 urteko ikasleek parte hartu dute. Aipatzekoa da lortutako emaitzak guztiz baikorrak izan direla eta epe-laburrerako ezarritako helburuak lortu direla. Horrez gain, epe-luzerako helburuak hein handi batean beteko direla aurreikusten da. Beraz, argi dago, zentroetan antolakuntza egoki bat ematen bada, Ikas- Komunitateen proiektuarekiko inplikazioa badago eta komunitatearen kohesioa lortzen bada, hezkuntza sistema hein batean alda daitekeela. Hori gertatuz gero, edozein motatako pertsonak hezkuntza emaitzarik onenak lor ditzake eta baita informazioaren gizarte honetan jarduten ikas dezake ere.

Physiological modules for generating discrete and rhythmic movements: action identification by a dynamic recurrent neural network

In this study we employed a dynamic recurrent neural network (DRNN) in a novel fashion to reveal characteristics of control modules underlying the generation of muscle activations when drawing figures with the outstretched arm. We asked healthy human subjects to perform four different figure-eight movements in each of two workspaces (frontal plane and sagittal plane). We then trained a DRNN to predict the movement of the wrist from information in the EMG signals from seven different muscles. We trained different instances of the same network on a single movement direction, on all four movement directions in a single movement plane, or on all eight possible movement patterns and looked at the ability of the DRNN to generalize and predict movements for trials that were not included in the training set. Within a single movement plane, a DRNN trained on one movement direction was not able to predict movements of the hand for trials in the other three directions, but a DRNN trained simultaneously on all four movement directions could generalize across movement directions within the same plane. Similarly, the DRNN was able to reproduce the kinematics of the hand for both movement planes, but only if it was trained on examples performed in each one. As we will discuss, these results indicate that there are important dynamical constraints on the mapping of EMG to hand movement that depend on both the time sequence of the movement and on the anatomical constraints of the musculoskeletal system. In a second step, we injected EMG signals constructed from different synergies derived by the PCA in order to identify the mechanical significance of each of these components. From these results, one can surmise that discrete-rhythmic movements may be constructed from three different fundamental modules, one regulating the co-activation of all muscles over the time span of the movement and two others elliciting patterns of reciprocal activation operating in orthogonal directions.

La cuestión de las azagayas de base hendida magdalenienses en la Cornisa Cantábrica

[ES] Durante la excavación de la cueva de Praile Aitz I (Deba, Gipuzkoa) se ha hallado una azagaya de base hendida sobre un suelo de cantos de caliza en el que se definió un contexto de habitación constituido por un hogar, escasos restos de industria y fauna, y varios colgantes. Estos materiales se atribuyen al Magdaleniense Inferior Cantábrico con fechas que se sitúan entre el 15.190 y 15.810 BP. Aprovechando este descubrimiento se realiza una revisión de ejemplares de similares características hallados en otros yacimientos cantábricos (Balmori, El Castillo) y se plantea la posible cronología magdaleniense del ejemplar de Santimamiñe.

Traditional part-time grazing: a more sustainable sheep milk and cheese production in the Basque Country

[EN] The concept of sustainability when referring to food production rests, in general, on 3 main aspects: 1) respect for the environment; 2) economic and social benefits for all involved in production; and 3) production of sufficient quantity of quality food at an accessible price. In this contribution we focus on the main aspects of the traditional sheep's milk and cheese production (under the Denomination of Origin Idiazabal Cheese) in the Basque Country that contribute primarily to its sustainability. It is based on the local latxa or carranzana breeds of sheep, adapted to the mountainous terrain. The sheepherder takes advantage of local resources to reduce management costs by combining indoor dry forage and concentrates with outdoor grazing throughout lactation, according to local pasture availability, and thus avoiding having to buy large amounts of feed. This system facilitates recycling of manure, fertilising pastures and forest at the same time. Use of local breeds helps maintain biodiversity of sheep breeds. Cheese is produced industrially (44.5% of the total cheese produced in 2008) from milk of many flocks, or artisanally (38.3%) by the sheepherders with the milk from their own flocks. Transforming their own milk into cheese is advantageous for the following reasons: 1) higher economic returns as compared to selling the milk to cheese factories because cheese price directly sold to consumers is more competitive than industrial cheese sold in supermarkets; 2) increases the value of women's work (over 80% of the cheese makers are women) in the community and their self-esteem; 3) it creates rural jobs and contributes to rural development; 4) we have demonstrated both with experimental and commercial flocks that part-time grazing allows the sheepherder to obtain high yields of milk, and cheese, of high nutritional and functional quality. Currently a less sustainable, intensive sheep's milk production with foreign, imported breeds kept indoors constantly is gaining favour among milk producers because of its perceived higher economic profitability.